湿陷性黄土

• Collapse area tunnels in roadbase treated by the grouting is one task of china transplation darpartment science item " survey the tunnel in collapse area " . the paper mainly studied using the grouting treat tunnels in roadbase in collapse area
  注浆法在湿陷性黄土路基暗穴处理中的应用研究是交通部西部交通科技项目“探测湿陷性黄土暗穴技术研究”的一个子题，本文重点开展注浆法在湿陷性黄土路基暗穴处理中的应用研究。
• Collapsible loess has a wide distribution in midwest china , which in some extent , impacts the subgrade construction and the forming quality of highway engineering ; this thesis explores corresponding construction strategies through mathematical analysis combined with practical experience summary
  摘要湿陷性黄土国内中西部地区分布较广，给公路工程的路基施工和成形质量造成一定的影响；本文通过数理分析结合实践经验总结探索了相应的施工对策。
• In the paper , through the example of the waiting hall of xt an international airport , several main questions meet in the design have been discussed , analyzed and solved , which include in negative friction force around pile in collapsible loess , the calculating method of bearing capacity of pile . the crack control methods of analysis and design in the super - length reinforced structure have been tested in the project , and reached the effect to be hoped
  本文通过西安咸阳国际机场新航站楼工程设计的具体实例，分析、论述了建筑结构在设计中遇到并解决的几个主要问题：如自重湿陷性黄土场地桩基负摩阻力问题；浅层土虽经强夯但下层土仍有可能产生负摩阻力时桩的承载力计算方法；对钢筋混凝土结构的裂缝控制实现超长设计的分析和设计对策，经过工程验证，达到了预期的效果。
• In the macroscopical field : ( 1 ) the relationship between the moisture and the speed of average collapse was attained , that is , the speed of average collapse will increase with increasing of the moisture at first , but it will decrease when the value get to certain max with increasing of the moisture ; ( 2 ) the model of relationship between the pressure and the speed of average collapse was established on the basis of experiment . the conclusion of that the speed of average collapse bouncing increase with increasing of the pressure was attained and the relationship between stress and distortion was established ; ( 3 ) the method of synthetical evaluation for collapsibility loess under the effect of time , pressure and moisture was offered
  在宏观角度上： （ 1 ）以辽宁阜新地区黄土试样的固结试验数据为分析对象，得到了黄土湿陷速率与含水量的关系曲线呈单峰状态的结论，即黄土湿陷速率在土体浸水初期会随着含水量的增加而增大，但当含水量超过某一数值趋于饱和含水量时，黄土湿陷速率却随着含水量的增加而减小； （ 2 ）立了黄土湿陷速率与压力之间关系的数学模型，得出了黄土湿陷速率随压力的增大而呈阶越增长的结论以及阜新地区湿陷性黄土的本构关系； （ 3 ）提供了在时间、含水量及压力等因素共同作用下，对黄土湿陷性进行综合评价的方法。
• In this paper , based on the subject of the technology of exploring loess pitfall in collapsibility loess roadbed , the author summed of the history of the loess pitfall and researched on the classification and form mechanism of loess pitfall , at last , analysis the stability of the pitfall by using fem program of marc
  本文依托湿陷性黄土路基陷穴探查技术研究课题，首先对黄土陷穴的研究历史、现状及存在的问题进行了综述。然后对黄土陷穴的形成机理、黄土陷穴的分类及分布特征进行了详细的论述，对黄土陷穴稳定性评价方法也进行了介绍，并利用有限元对其进行了分析。
• In accordance with the construction of xi ' ning - huangyuan first class highway and machangyuan - ping ' an high - speed highway , based on a good deal of investigation , this paper studies the geologic character and the main physical mechanics of the collapsibility loess in qinghai . this paper also studies the foundation treatment effect with dynamic consolidation , impact rolling , lime pile and lime - soil cushion . to dynamic consolidation , much attention is given to the relationship between the ramming energy and the effective depth
  本文结合西湟一级公路、马平高速公路建设，对青海地区湿陷性黄土进行了大量勘探调查，总结研究了青海地区湿陷性黄土的地质结构特点、主要的物理力学性质及其规律；并通过现场试验，系统地研究了强夯、冲击碾压、灰土挤密桩和灰土换填等地基处理方法的施工工艺及处理效果。
• Finally summarizing comprehensively various measures deals with collapsible loess , aiming at property and actual condition of collapsible loess at guanzhong area , taking example for foundation trea tment of xianyang aerodrome speedway , investigating and demonstrating many projects on foundation treatment and think dynamic compaction and lime - soil compaction pile are fit to treat collapsible loess of this section , designing both of the projects and hope to offer suggestions to engineering practice
  最后全面总结了湿陷性黄土处理的各种措施，针对关中地区湿陷性黄土的特点和实际情况，以咸阳机场高速公路路基处理为例，对多种地基处理方案进行研究论证后认为，强夯法和灰土挤密桩法适合该路段湿陷性黄土处理，并分别对这两种方案进行了设计，以期给工程实践提供建议值。
• Then on the basis of experimental data of collapsible loess of speedways from weinan to tongguan and xianyang aerodrome , analyzing influential factors of collapsibility , establishing expressions between collapsible coefficient and physical mechanical character parameters via regression analysis , and discuss preliminarily collapsible mechanism of loess at guanzhong area
  重点以渭潼高速公路和咸阳机场专用高速公路沿线湿陷性黄土的试验资料为基础，对黄土湿陷影响因素进行了分析，通过回归分析建立了湿陷系数与各物理力学性质指标之间的关系式，并对关中地区黄土的湿陷机理进行了初步探讨。
• The collapsible loess is often met during the construction of the high - grade highway in the loess area , and the main failure is the uneven subsidence of the roadbed and the culvert , which affects the safe usage of the roadbed and the culvert , etc . directed against this , based on the chankou - lanzhou freeway construction , the paper analyzes the application of the composite ground formed by lime - soil pile under the bridge and designs the project , discusses the rules of the contact pressure , the stress ratio of the pile and the soil , compares the p - s curves of one pile , the composite ground formed by one pile and the composite ground formed by two piles based on the in - situ plate loading test , evaluates the bearing capacity of the composite ground of the project
  黄土地区的高等级公路建设中经常遇到湿陷性黄土问题，其病害类型主要是地基土受水浸湿后引起路基、桥台、涵洞等的不均匀沉降，直接影响路基、构造物等的正常使用。针对此问题，本文依托甘肃谗口至兰州柳沟河高速公路建设工程，对桥基灰土桩复合地基应用的可行性进行了深入分析，根据具体工程进行了合理的设计与计算，并配合现场静载荷试验及压力盒实测数据，探讨了基底应力分布规律，桩土应力比，变形模量的变化关系，对比分析了单桩、单桩复合和双桩复合的p ? s关系，对桥基灰土桩复合地基承载力进行了整体评价。
• Through researching on the classification and form mechanism of loess pitfall , some methods treating the pitfall in collapsibility loess roadbed such as grouting , geocell , explosion , dynamic consolidation and sddc etc . are put forward and the suitable terms of various kinds of methods and their own pluses and minuses have been discussed
  通过对黄土陷穴的分类、形成机理进行分析研究，提出了灌浆法、土工格室、爆破法、强夯法、 sddc法等几种湿陷性黄土路基陷穴处理的方法，并分析了各种方法的适用条件和各自的优缺点。